Simulated Engine Outs

you don't get much of an "engine out" at 1500RPM

sort of builds a false sense of security of the seemingly good glide ratio

BT

"BoDEAN" wrote in message
...
In small high wing planes (Ie 172, 152, 150) do you do/teach pulling
throttle all the back to idel? I've been told bring it to 1500 RPM, 1
notch of flaps. Not as hard on the engine

I'm going with BT on this one.... I know the post is about the potential for
engine damage, and I'm guessing that the people using this technique are
worried about shock cooling caused by the prop driving the engine and
forcing the engine to digest more cool air through it's cylinders than
normal.... just a guess... but I'd be more worried about what it teaches the
student. Think about it. Even at idle the engine is producing "some"
power. However you want to explain it, power either produces lift or
extends glide range. I'm not sure that 1 notch of flaps produces enough
drag to overcome the increased lift created by the 1500 rpms + flaps
configuration.
Just a thought. (But I'm on so much cold medicine I might not be thinking
to clearly)
--
Jim Burns III

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"BTIZ" wrote in message
news:nl_Wb.15852$IF1.7345@fed1read01...
you don't get much of an "engine out" at 1500RPM

sort of builds a false sense of security of the seemingly good glide ratio

BT

You can simulate a engine out approach by adding just enough drag to
offset the engine rpm. In the Canadian PTS, this was specifically
mentioned as an acceptable practice. However, as others have pointed
out there is no clear evidence to support the shock cooling theory in
small aircraft. Some believe it exists, and some don't.

You have to do whatever you feel is necessary to safely simulate an
engine out approach. There is nothing wrong with leaving 1500 RPM and
using flaps. Even if you pull the power back completely, one can argue
that frequently clearing the engine unrealistically increases the
glide range. The effect of power on glide performance is not all that
different than the effects of wind. There are too many variables to
claim that one way is better than another. It all comes down to what
the pilot is comfortable with.





"BTIZ" wrote in message news:nl_Wb.15852$IF1.7345@fed1read01...
you don't get much of an "engine out" at 1500RPM

sort of builds a false sense of security of the seemingly good glide ratio

BT

"BoDEAN" wrote in message
...
In small high wing planes (Ie 172, 152, 150) do you do/teach pulling
throttle all the back to idel? I've been told bring it to 1500 RPM, 1
notch of flaps. Not as hard on the engine